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"CDC guidelines are still recommended but not required, and the president is the most tested man in America," she said, referring to the Centers for Disease Control and Prevention. "It's his decision whether to wear a mask."

"China has a very clear goal to largely develop direct financing," he added.

"By December we could ... begin vaccination," a development he described as "very important, because it would allow us to vaccinate vulnerable sectors in Argentina."

"China has demonstrated a strong willingness toward de-risking," said Nicholas Zhu, vice-president and senior credit officer at Moody's Investors Service. Zhu said global credit ratings agencies are keeping a close watch to see if financial leverage increases due to the stimulus measures for curbing downside pressures on the economy.

"China has been at the forefront in digital payment technology development," said Di Gang, a senior engineer of the institute.